Morning links: Philip Rivers' sack rate

Good morning. Scott Kacsmar of Football Outsiders examines the sack rate of all starting quarterbacks from the 2013 season. Kacsmar considers sack rate a better predictor of future quarterback performance than interceptions and a true measurement of quarterback performance because there is less variation than what happens after the ball leaves a quarterback’s hands.

Kacsmar points to Peyton Manning's sack rate as evidence. Since entering the league in 1998, Manning has seven of the top 18 seasons in sack rate during that time frame. And Manning led the league again in 2013 with a 2.81 percent true sack rate.

San Diego Chargers quarterback Philip Rivers finished No. 7 in the league with a 5.08 percent true sack rate, which is much better than his No. 33 ranking in 2012 (8.35 percent).

The bottom line is San Diego’s switch to more of an up-tempo offense helped Rivers have clearer definition down the field, speeding up his reads and getting the ball out more quickly than in previous seasons.

Rivers talks with Darren Smith of The Mighty 1090 AM radio about San Diego’s regular-season schedule in this audio link.

ABC 10 News in San Diego obtained video footage of San Diego Chargers outside linebacker Thomas Keiser's altercation at a bar after the Kansas City game on Dec. 29. Keiser was charged with misdemeanor battery and posted bail at $8,000. On March 24 he pled guilty and was sentenced to probation, ordered to pay a fine and complete 20 hours of anger management counseling. The Chargers have not commented on Keiser’s discipline by the organization.

Michael Gehlken of U-T San Diego talks with Chargers running back Ryan Mathews, who says he looks forward to playing in the same backfield with new addition Donald Brown in the upcoming season.

ESPN’s Ryan McGee profiles small-school cornerback Pierre Desir, a lanky, play-making cornerback in the mold of Richard Sherman who could make some sense in Day 2 of this year’s draft for the Chargers.

The Denver Broncos are using 35 -- the embarrassing deficit they lost to the Seahawks by in the Super Bowl -- as motivation during offseason work.

Here’s video footage of San Diego players handling their business in the weight room.